Sank,Back in the day,the 261 Jobmaster was Chevy's "King-OF-The-Road. It was the biggest engine in the Chevy trucks,until they installed V-8's,(265's),in'55. There are a lot of old truck pic's,where the A.D.,and Task-Force trucks were used as semi-tractors. mine,actually,started out as a fire-truck,but was built to haul a lot of weight,and move it down the road quickly. In 1955,when "she was built,55 M.P.H.,for a 2-ton,was preety quick. Oh yeah,she'll pull a trailer. I don't know if raising your rear-end gear would be such a good idea for that purpose,though. I think your best deal (for the money), would be to find a Brown-Lipe auxiliary transmission,with a 3rd Over-drive,as opposed to 3rd. direct-drive. This would give you three more gears to choose from,which actually gives you 18 forward gears,and 6 reverse! Sending a P.M.
